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stiv31 [10]
3 years ago
5

Create (and label) a graph in the coordinate plane to show the relationship between time and the amount of

Mathematics
1 answer:
Nadya [2.5K]3 years ago
3 0

Answer:

its poportional

Step-by-step explanation:

i got it right

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Jami went to have a manicure that cost $25. She wanted to tip the technician 20% and
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Answer:  $35.75

Step-by-step explanation:

1)  $25 for the manicure

2)  $25*(0.20) = $5 for the tip

3)  $5.75 for the tip

$25 + $5 + $5.75 for the total

$35.75 total

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3 years ago
a grocery bag containing 4 potatoes weighs 2 pounds. An identical bag contains 12 potatoes weighs 4 pounds. Write an equation in
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Use the ordered pairs to first find the slope then substitution into y=mx+b to find b

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A car dealership has five exterior color choices, six interior color choices, and two model choices. How many different ways cou
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18 is 4.5 times a number.
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4

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3 years ago
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A researcher collated data on Americans’ leisure time activities. She found the mean number of hours spent watching television e
ikadub [295]

The value of the z statistic for the considered data is given by: Option A: -3.87 approximately.

<h3>How to find the z score (z statistic) for the sample mean?</h3>

If we're given that:

  • Sample mean = \overline{x}
  • Sample size = n
  • Population mean = \mu
  • Sample standard deviation = s

Then, we get:

z = \dfrac{\overline{x} - \mu}{s}

If the sample standard deviation is not  given, then we can estimate it(in some cases) by:

s = \dfrac{\sigma}{\sqrt{n}}

where \sigmapopulation standard deviation

For this case, we're specified that:

  • Sample mean = \overline{x} = 2.3
  • Sample size = n = 15
  • Population mean = \mu  = 2.7
  • Population standard deviation = \sigma = 0.4

Thus, the value of the z-statistic is evaluated as:

z = \dfrac{\overline{x} - \mu}{\sigma/\sqrt{n}} = \dfrac{2.3- 2.7}{0.4/\sqrt{15}} \approx -3.87

Thus, the value of the z statistic for the considered data is given by: Option A: -3.87 approximately.

Learn more about z statistic here:

brainly.com/question/27003351

6 0
3 years ago
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